///////////////////////////////////////////////////////////////////////////////
//
// lighthouse3D - 3D Software Library
//
// File: CFilter.cpp
//
///////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2003-2013 Marcus Reinhardt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//
///////////////////////////////////////////////////////////////////////////////
//
// You can find a copy of the GNU General Public License (gpl.txt) in the
// directory of the library.
//
///////////////////////////////////////////////////////////////////////////////
#include "CFilter.h"

///////////////////////////////////////////////////////////////////////////////
// CFilter::CFilter( ... )
///////////////////////////////////////////////////////////////////////////////
CFilter::CFilter()
{
}

///////////////////////////////////////////////////////////////////////////////
// CFilter::~CFilter( ... )
///////////////////////////////////////////////////////////////////////////////
CFilter::~CFilter()
{
}

///////////////////////////////////////////////////////////////////////////////
// CFilter::bilinearFilter( ... )
///////////////////////////////////////////////////////////////////////////////
float CFilter::bilinearFilter(TBilinearMap defMap, TBilinearMap dataMap)
{
  float result;

  result = ( defMap.d[1][0] * dataMap.d[1][0] +
             defMap.d[0][1] * dataMap.d[0][1] +
             defMap.d[1][1] * dataMap.d[1][1] +
             defMap.d[2][1] * dataMap.d[2][1] +
             defMap.d[1][2] * dataMap.d[1][2] ) /
           ( defMap.d[1][0] + defMap.d[0][1] + defMap.d[1][1] + 
             defMap.d[2][1] + defMap.d[1][2] );

  return result;
}

///////////////////////////////////////////////////////////////////////////////
// CFilter::blFDefMapOne( ... )
///////////////////////////////////////////////////////////////////////////////
void  CFilter::blFDefMapOne(TBilinearMap *defMap)
{
  defMap->d[1][0] = 1;
  defMap->d[0][1] = 1;
  defMap->d[1][1] = 1;
  defMap->d[2][1] = 1;
  defMap->d[1][2] = 1;

  defMap->d[1][0] = 1;
  defMap->d[0][1] = 0;
  defMap->d[2][1] = 0;
  defMap->d[1][2] = 1;
}

///////////////////////////////////////////////////////////////////////////////
// CFilter::liFDefMapOne( ... )
///////////////////////////////////////////////////////////////////////////////
void  CFilter::liFDefMapOne(TBilinearMap *defMap)
{
  defMap->d[1][0] = 0;
  defMap->d[1][1] = 1;
  defMap->d[0][1] = 1;
  defMap->d[2][1] = 1;
  defMap->d[1][2] = 0;
}

